An analysis of thousands of gun control studies claims that just 63 of those studies found connections between more stringent gun control laws violent crime and suicide reductions.

The non-profit RAND corporation spent two years and $1 million on the analysis, searching for evidence of benefit from gun control policies. RAND’s analysis looked to establish connections between gun policies and rates of homicide, suicide, self-defense gun use, hunting, and other categories. The vast majority of those categories went unaffected by legislation, however, according to NPR.

“Most of the effects that we were looking for evidence on, we didn’t find any evidence,” Andrew Morral, who lead the analysis.

The RAND team also surveyed 95 gun policy experts from across the political spectrum about what they thought the effects of 15 different gun policies would be on 12 outcomes. The policies included universal background checks, bans on the sale of assault weapons and high-capacity magazines, expanded mental illness prohibitions, minimum age requirements and required reporting of lost or stolen weapons.

Many of the policies are now being considered by state and federal lawmakers, after a man used an AR-15-style rifle to kill 17 people at a Florida high school in February.

The vast majority of the specialists RAND surveyed agreed that the primary objectives of gun policies should be reducing suicides and homicides, and that protecting privacy, enabling hunting and sport shooting and preventing mass shootings were secondary priorities.